md5block_s390x.s

     1  // Original source:
     2  //	http://www.zorinaq.com/papers/md5-amd64.html
     3  //	http://www.zorinaq.com/papers/md5-amd64.tar.bz2
     4  //
     5  // MD5 adapted for s390x using Go's assembler for
     6  // s390x, based on md5block_amd64.s implementation by
     7  // the Go authors.
     8  //
     9  // Author: Marc Bevand <bevand_m (at) epita.fr>
    10  // Licence: I hereby disclaim the copyright on this code and place it
    11  // in the public domain.
    12  
    13  #include "textflag.h"
    14  
    15  // func block(dig *digest, p []byte)
    16  TEXT ·block(SB),NOSPLIT,$16-32
    17  	MOVD	dig+0(FP), R1
    18  	MOVD	p+8(FP), R6
    19  	MOVD	p_len+16(FP), R5
    20  	AND	$-64, R5
    21  	LAY	(R6)(R5*1), R7
    22  
    23  	LMY	0(R1), R2, R5
    24  	CMPBEQ	R6, R7, end
    25  
    26  loop:
    27  	STMY	R2, R5, tmp-16(SP)
    28  
    29  	MOVWBR	0(R6), R8
    30  	MOVWZ	R5, R9
    31  
    32  #define ROUND1(a, b, c, d, index, const, shift) \
    33  	XOR	c, R9; \
    34  	ADD	$const, a; \
    35  	ADD	R8, a; \
    36  	MOVWBR	(index*4)(R6), R8; \
    37  	AND	b, R9; \
    38  	XOR	d, R9; \
    39  	ADD	R9, a; \
    40  	RLL	$shift, a; \
    41  	MOVWZ	c, R9; \
    42  	ADD	b, a
    43  
    44  	ROUND1(R2,R3,R4,R5, 1,0xd76aa478, 7);
    45  	ROUND1(R5,R2,R3,R4, 2,0xe8c7b756,12);
    46  	ROUND1(R4,R5,R2,R3, 3,0x242070db,17);
    47  	ROUND1(R3,R4,R5,R2, 4,0xc1bdceee,22);
    48  	ROUND1(R2,R3,R4,R5, 5,0xf57c0faf, 7);
    49  	ROUND1(R5,R2,R3,R4, 6,0x4787c62a,12);
    50  	ROUND1(R4,R5,R2,R3, 7,0xa8304613,17);
    51  	ROUND1(R3,R4,R5,R2, 8,0xfd469501,22);
    52  	ROUND1(R2,R3,R4,R5, 9,0x698098d8, 7);
    53  	ROUND1(R5,R2,R3,R4,10,0x8b44f7af,12);
    54  	ROUND1(R4,R5,R2,R3,11,0xffff5bb1,17);
    55  	ROUND1(R3,R4,R5,R2,12,0x895cd7be,22);
    56  	ROUND1(R2,R3,R4,R5,13,0x6b901122, 7);
    57  	ROUND1(R5,R2,R3,R4,14,0xfd987193,12);
    58  	ROUND1(R4,R5,R2,R3,15,0xa679438e,17);
    59  	ROUND1(R3,R4,R5,R2, 0,0x49b40821,22);
    60  
    61  	MOVWBR	(1*4)(R6), R8
    62  	MOVWZ	R5, R9
    63  	MOVWZ	R5, R1
    64  
    65  #define ROUND2(a, b, c, d, index, const, shift) \
    66  	XOR	$0xffffffff, R9; \ // NOTW R9
    67  	ADD	$const, a; \
    68  	ADD	R8, a; \
    69  	MOVWBR	(index*4)(R6), R8; \
    70  	AND	b, R1; \
    71  	AND	c, R9; \
    72  	OR	R9, R1; \
    73  	MOVWZ	c, R9; \
    74  	ADD	R1, a; \
    75  	MOVWZ	c, R1; \
    76  	RLL	$shift,	a; \
    77  	ADD	b, a
    78  
    79  	ROUND2(R2,R3,R4,R5, 6,0xf61e2562, 5);
    80  	ROUND2(R5,R2,R3,R4,11,0xc040b340, 9);
    81  	ROUND2(R4,R5,R2,R3, 0,0x265e5a51,14);
    82  	ROUND2(R3,R4,R5,R2, 5,0xe9b6c7aa,20);
    83  	ROUND2(R2,R3,R4,R5,10,0xd62f105d, 5);
    84  	ROUND2(R5,R2,R3,R4,15, 0x2441453, 9);
    85  	ROUND2(R4,R5,R2,R3, 4,0xd8a1e681,14);
    86  	ROUND2(R3,R4,R5,R2, 9,0xe7d3fbc8,20);
    87  	ROUND2(R2,R3,R4,R5,14,0x21e1cde6, 5);
    88  	ROUND2(R5,R2,R3,R4, 3,0xc33707d6, 9);
    89  	ROUND2(R4,R5,R2,R3, 8,0xf4d50d87,14);
    90  	ROUND2(R3,R4,R5,R2,13,0x455a14ed,20);
    91  	ROUND2(R2,R3,R4,R5, 2,0xa9e3e905, 5);
    92  	ROUND2(R5,R2,R3,R4, 7,0xfcefa3f8, 9);
    93  	ROUND2(R4,R5,R2,R3,12,0x676f02d9,14);
    94  	ROUND2(R3,R4,R5,R2, 0,0x8d2a4c8a,20);
    95  
    96  	MOVWBR	(5*4)(R6), R8
    97  	MOVWZ	R4, R9
    98  
    99  #define ROUND3(a, b, c, d, index, const, shift) \
   100  	ADD	$const, a; \
   101  	ADD	R8, a; \
   102  	MOVWBR	(index*4)(R6), R8; \
   103  	XOR	d, R9; \
   104  	XOR	b, R9; \
   105  	ADD	R9, a; \
   106  	RLL	$shift, a; \
   107  	MOVWZ	b, R9; \
   108  	ADD	b, a
   109  
   110  	ROUND3(R2,R3,R4,R5, 8,0xfffa3942, 4);
   111  	ROUND3(R5,R2,R3,R4,11,0x8771f681,11);
   112  	ROUND3(R4,R5,R2,R3,14,0x6d9d6122,16);
   113  	ROUND3(R3,R4,R5,R2, 1,0xfde5380c,23);
   114  	ROUND3(R2,R3,R4,R5, 4,0xa4beea44, 4);
   115  	ROUND3(R5,R2,R3,R4, 7,0x4bdecfa9,11);
   116  	ROUND3(R4,R5,R2,R3,10,0xf6bb4b60,16);
   117  	ROUND3(R3,R4,R5,R2,13,0xbebfbc70,23);
   118  	ROUND3(R2,R3,R4,R5, 0,0x289b7ec6, 4);
   119  	ROUND3(R5,R2,R3,R4, 3,0xeaa127fa,11);
   120  	ROUND3(R4,R5,R2,R3, 6,0xd4ef3085,16);
   121  	ROUND3(R3,R4,R5,R2, 9, 0x4881d05,23);
   122  	ROUND3(R2,R3,R4,R5,12,0xd9d4d039, 4);
   123  	ROUND3(R5,R2,R3,R4,15,0xe6db99e5,11);
   124  	ROUND3(R4,R5,R2,R3, 2,0x1fa27cf8,16);
   125  	ROUND3(R3,R4,R5,R2, 0,0xc4ac5665,23);
   126  
   127  	MOVWBR	(0*4)(R6), R8
   128  	MOVWZ	$0xffffffff, R9
   129  	XOR	R5, R9
   130  
   131  #define ROUND4(a, b, c, d, index, const, shift) \
   132  	ADD	$const, a; \
   133  	ADD	R8, a; \
   134  	MOVWBR	(index*4)(R6), R8; \
   135  	OR	b, R9; \
   136  	XOR	c, R9; \
   137  	ADD	R9, a; \
   138  	MOVWZ	$0xffffffff, R9; \
   139  	RLL	$shift,	a; \
   140  	XOR	c, R9; \
   141  	ADD	b, a
   142  
   143  	ROUND4(R2,R3,R4,R5, 7,0xf4292244, 6);
   144  	ROUND4(R5,R2,R3,R4,14,0x432aff97,10);
   145  	ROUND4(R4,R5,R2,R3, 5,0xab9423a7,15);
   146  	ROUND4(R3,R4,R5,R2,12,0xfc93a039,21);
   147  	ROUND4(R2,R3,R4,R5, 3,0x655b59c3, 6);
   148  	ROUND4(R5,R2,R3,R4,10,0x8f0ccc92,10);
   149  	ROUND4(R4,R5,R2,R3, 1,0xffeff47d,15);
   150  	ROUND4(R3,R4,R5,R2, 8,0x85845dd1,21);
   151  	ROUND4(R2,R3,R4,R5,15,0x6fa87e4f, 6);
   152  	ROUND4(R5,R2,R3,R4, 6,0xfe2ce6e0,10);
   153  	ROUND4(R4,R5,R2,R3,13,0xa3014314,15);
   154  	ROUND4(R3,R4,R5,R2, 4,0x4e0811a1,21);
   155  	ROUND4(R2,R3,R4,R5,11,0xf7537e82, 6);
   156  	ROUND4(R5,R2,R3,R4, 2,0xbd3af235,10);
   157  	ROUND4(R4,R5,R2,R3, 9,0x2ad7d2bb,15);
   158  	ROUND4(R3,R4,R5,R2, 0,0xeb86d391,21);
   159  
   160  	MOVWZ	tmp-16(SP), R1
   161  	ADD	R1, R2
   162  	MOVWZ	tmp-12(SP), R1
   163  	ADD	R1, R3
   164  	MOVWZ	tmp-8(SP), R1
   165  	ADD	R1, R4
   166  	MOVWZ	tmp-4(SP), R1
   167  	ADD	R1, R5
   168  
   169  	LA	64(R6), R6
   170  	CMPBLT	R6, R7, loop
   171  
   172  end:
   173  	MOVD	dig+0(FP), R1
   174  	STMY	R2, R5, 0(R1)
   175  	RET
   176
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